ETC Technical Design & Engineering Principles 3

Question 1

In engineering design, what does FMEA stand for and what is its primary purpose?

Accepted Answer

Failure Mode and Effects Analysis — to identify potential failures and their impacts

Answer

FMEA (Failure Mode and Effects Analysis) is a systematic method for identifying potential failure modes, their causes, and their effects on system performance.

Question 2

Which type of fit allows two mating parts to be assembled and disassembled by hand without special tools, with a guaranteed clearance?

Accepted Answer

Clearance fit

Answer

A clearance fit guarantees a positive space (clearance) between mating parts in all cases, allowing easy hand assembly.

Question 3

A cantilever beam with a point load at its free end experiences maximum bending moment at:

Accepted Answer

The fixed support

Answer

For a cantilever with a point load at the free end, the bending moment is zero at the free end and increases linearly to a maximum at the fixed support.

Question 4

What is the function of a tolerance stack-up analysis in mechanical design?

Accepted Answer

To determine the cumulative effect of individual part tolerances on assembly dimensions

Answer

Tolerance stack-up analysis evaluates how individual part tolerances accumulate through an assembly to determine if functional requirements will be met.

Question 5

Which section view type is used to show the interior of a part that is not symmetrical by rotating the cutting plane?

Accepted Answer

Offset section

Answer

An offset section view uses a cutting plane that bends or offsets to pass through features not aligned along a single straight line.

(ETC) Engineering Technician Certification Practice Test

(ETC) Engineering Technician Certification Practice Test

ETC Technical Design & Engineering Principles 3